diff --git a/Makefile.am b/Makefile.am
index dedabdd869..7e25a39583 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -97,6 +97,7 @@ CRUFT_DIRS = \
 	$(top_srcdir)/gst/valve \
 	$(top_srcdir)/gst-libs/gst/baseparse \
 	$(top_srcdir)/gst-libs/gst/video \
+	$(top_srcdir)/gst-libs/gst/signalprocessor \
 	$(top_srcdir)/tests/examples/scaletempo \
 	$(top_srcdir)/tests/examples/shapewipe \
 	$(top_srcdir)/tests/examples/switch \